code: def create_training_data(self):
      np.random.seed(20)
      x = np.random.rand(20, 10)
      y = np.random.randint(0, 2, (20))
      return x, y
  
imports: import pytest
  from bigdl.orca.test_zoo_utils import ZooTestCase
  import tensorflow
  import numpy
  import os
  from bigdl.orca.tfpark import KerasModel, TFDataset, TFOptimizer
label_desc: Use image node_id 4 for calling the TestTFParkModel obj's underlying member method code with example usage: obj.create_training_data() and returns: x,  y